Montana-Dakota Utilities (MDU), a division of MDU Resources Group, Inc., supplies natural gas to over 300,000 customers in Montana, North Dakota, South Dakota, and Wyoming. Approximately 50,000 residential and commercial customers are served in the state of South Dakota. It serves Pierre, Camp Crook, Rapid City proper and the surrounding communities of Rapid Valley, Box Elder, Black Hawk, Piedmont, Summerset, and Ellsworth Air Force Base. We also serve the northern Black Hills towns of Spearfish, Lead, Central City, Deadwood, Belle Fourche, St. Onge, Sturgis, Whitewood and Colony Wyoming. MDU has access to gas from the Rocky Mountain region which historically has been some of the lowest priced gas in the nation. Our retail and transportation rates are available on the internet www.montana-dakota.com